My only hobby at the moment are the game of Go and dabbing in math/logics/AI, which, as fascinating as they are, are seldom considered very attractive.

I personally used to play Go a lot (my playing strength was something like 1-2 kyu). I replaced that hobby completely with Salsa/Bachata dancing. The first few months were out of my comfortzone but afterwards I consider the experience to be more fun than playing Go and it produces more positive benefits than playing Go.